I wonder if you can test to see if this happens if you had an analogue phone set connected. And if it doesn't then I am wondering why Asterisk or Sangoma card is so sensitive and maybe the sensor can be set a bit higher so these calls don't end-up ringing like they don't if an analogue phone set was connected to the line (at least that was my case).
-Bruce On Mon, Apr 11, 2011 at 9:52 AM, Danny Nicholas <[email protected]> wrote: > ------------------------------ > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Brian Henning > *Sent:* Monday, April 11, 2011 8:47 AM > > *To:* 'Asterisk Users Mailing List - Non-Commercial Discussion' > *Subject:* Re: [asterisk-users] Occasional call from "asterisk" > > > > Bruce B said: > > We experience exact same thing on DAHDI with Sangoma USB FXO device on > short circuited lines. Phantom calls are actually due to a short in the > lines that happen occasionally. > > > > -Bruce > > Also, Warren Selby said: > > > > I've seen this on cases where a "phantom" call comes in on a DAHDI channel > - these calls were the results of faulty wiring on the part of the telco. > Check your logs for any errors on your DAHDI channels around the time of the > "ghost" calls. > > It could also be a case of someone calls in and then hangs up before the > call is actually passed to asterisk, and the telco is just slow to hangup > the call. > > > Hmmmm. I do see this in the /var/log/asterisk/messages log: > > > > [Apr 5 00:05:36] NOTICE[9579] chan_dahdi.c: Got event 4 (Alarm)... > > [Apr 5 00:05:38] NOTICE[9579] chan_dahdi.c: Got event 5 (No more alarm)... > > [Apr 5 00:05:38] NOTICE[9579] chan_dahdi.c: Got event 17 (Polarity > Reversal)... > > [Apr 5 00:05:41] WARNING[2400] chan_dahdi.c: Detected alarm on channel 3: > Red Alarm > > [Apr 5 00:05:42] NOTICE[2400] chan_dahdi.c: Alarm cleared on channel 3 > > [Apr 5 00:05:51] WARNING[2400] chan_dahdi.c: Detected alarm on channel 2: > Red Alarm > > [Apr 5 00:05:53] NOTICE[2400] chan_dahdi.c: Alarm cleared on channel 2 > > > > …and it appears to coincide directly with an ‘asterisk’ entry in my SIP > phone’s missed call log. > > > > Our wiring is sketchy; this is known at our facility. Some years ago a > backhoe severed the entire trunk and the repair work was of questionable > quality. Also our service entry point / punch-down area is a rat’s nest > (one building and service is shared by three companies). I guess I can > chalk this behavior up to the wiring. > > > > Thanks for the input! > > > > Cheers, > > ~Brian > > *[Danny Nicholas] * > > *I’ll add another vote to “shoot the phone company” – our wiring goes to > heck whenever it rains and we can expect a few ‘phantom calls” from > Asterisk.* > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
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